P0349 Camshaft Position Sensor Intermittent - Bank 2 Sensor 1

Possible causes P0349 code

• Low engine oil level.
• Engine oil aerated or contaminated.
• Incorrect engine oil filter.
• Insufficient oil pressure due to a mechanical failure in the oiling system.
• 5-volt supply circuit shorted to voltage.
• 5-volt supply circuit open.
• 5-volt supply circuit shorted to ground.
• 5-volt supply circuit shorted to the sensor ground circuit.
• CMP 2/1 signal circuit shorted to voltage.
• CMP 2/1 signal circuit shorted to ground.
• CMP 2/1 signal circuit shorted to the sensor ground circuit.
• CMP 2/1 signal circuit open/high resistance.
• Sensor ground circuit open/high resistance.
• Camshaft position sensor.
• Camshaft tone wheel loose/damaged or misaligned.
• Camshaft 2/2 oil control valve faulty or intermittently binding/sticking spool valve.
• Camshaft 2/2 phaser faulty or intermittenly binding/sticking.
• Powertrain Control Module (PCM).
• Oil pressure issue in cylinder head.

Diagnose code P0349 Camshaft Position Sensor Intermittent - Bank 2 Sensor 1

(Step 1-6, see code P0394)
Step 1. Check the engine oil level and condition

Step 2. Check for an active DTC

Step 3. Other cam sensor DTC active

Step 4. Check the 5-volt supply circuit

Step 5. Check the sensor ground circuit for an open or high resistance

Step 6. Camshaft position sensor 2

(Step 7-11, see code P0369)

Step 7. Check the CMP 2/1 signal circuit for a short to voltage

Step 8. Check the CMP 2/1 signal circuit for a shorted to ground

Step 9. Check for the CMP 2/1 signal circuit shorted to the sensor ground circuit

Step 10. Check the CMP 2/1 signal circuit for an open/high resistance

Step 11. Camshaft Position Sensor

Step 12. Check the engine oil pressure and engine mechanical condition

Install the applicable adaptor to the oil filter cap and install an oil pressure gauge to the adaptor. If the adaptor is not available, monitor the oil pressure reading with the scan tool. Start the engine and allow it to idle, monitor the engine oil pressure reading on the gauge or scan tool.

Note: If the oil pressure is below 14 psi or oscillating excessively, it can cause a delay in Cam Phaser movement sufficient enough to set a slow response or CMP Sensor intermittent DTC.

Is the oil pressure reading stable and above 14.0 psi?

YES, go to step 13.

NO, repair the engine oiling or mechanical condition (i.e. improper oil drain back, oil sludge, damage oil pump, pick-up tube or seal, etc.).

Step 13. Check the camshaft 2/2 oil control valve operation

Turn the ignition off, remove the VVT exhaust solenoid 2/2. Inspect the spring loaded spool valve on the oil control valve.

Note : The spring loaded spool valve should be flush with the surface of the Oil Control Valve when at rest.

Push and release the spring loaded spool valve againts the return spring with a small punch.

Note: The spring loaded spool valve should move freely without binding and return to the flush position if there are no problems with the Oil Control Valve.

Was the spring loaded spool valve flush and able to move freely without dragging or sticking?

YES, go to step 14.

NO, replace the camshaft 2/2 oil control valve.

Step 14. Check related PCM and component connections

(Step 15-19, see code P0344)
Step 15. Powertrain Control Module
Step 16. Inspect camshaft sensor tone wheel
Step 17. Camshaft and phaser assembly
Step 18. Wire harness/ CKP sensor inspection
Step 19. Check the vehicles repair history

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